According to studies performed on Piper marginatum Jacq by other authors [43, 47, 48], exceptional antimicrobial activity from total ethanol extract and factions from this plant could be attributed to presence of secondary metabolites, such as alkaloids, neolignans, terpenoids, flavones, flavonoids, propenyl
phenols, aliphatic amides, and aromatic amides.
Jones, "A comparison of the toxicity of some allyl, propenyl
, and propyl compounds in the rat," Toxicology and Applied Pharmacology, vol.
detailing a "grafted copolymer of cross-linked sodium polyacrylate identified as 2-propenoic acid, polymers with N, N-di-2 propenyl
-2-propen -1-amine and hydrolyzed polyvinyl acetate, sodium salts, graft (CAS Rg.
nIT breaks open onion cells which free enzymes that produce propenyl
PA ([(C[D.sub.3]).sub.2]S0, [.sup.[delta]ppm): 2.40-2.60 (solvent residual peak of [(C[D.sub.3]).sub.2]S0), 4.97-6.33 (C[H.sub.2]=CH-C[H.sub.2]-, propenyl protons), 8.10-9.15 (six protons of benzene ring in PA).
APEG ([(C[D.sub.3]).sub.2]S0, [.sup.[delta]ppm): 2.50 (solvent residual peak of [(C[D.sub.3]).sub.2]S0), 3.00-3.80 (-OC[H.sub.2]C[H.sub.2]-, ether groups), 3.80-6.00 (C[H.sub.2]=CH-C[H.sub.2]-, propenyl protons), 4.40-4.60 (-OH, active hydrogen in APEG).[Fig.
chain can also improve the efficiency due to the presence of the double C=C bond.
More work is needed to determine how derivative is formed, but it could be generated by dehydration of both sides of the propenyl group of allicin.
It is hypothesized that allicin is converted to its derivative, which is 2 atomic mass units smaller, by dehydration of both sides of the propenyl group of allicin during fermentation.
Structures of 15 major color compounds of onion and leek were determined; the pigment is a complex mixture of highly conjugated species composed of two N-substituted 3,4-dimethylpyrrole-derived rings linked by bridge from the methyl group of methiin or propenyl
group of isoalliin .
Among aromatics with allyl, propenyl
and/or methoxy side chains, safrole and asarone showed similar trypanocidal activity, safrole being a little bit more active than asarone.